For as long as I can remember, my dad's eyes produce lots of tears just randomly. He could be sitting in front of the television and yawn and there will be tears as if he was crying (no he is not crying). He will have teary eyes all the time, but more when he is tired. I know this isn't normal but I don't know if it is a sign of something being wrong with his eyes. Sometimes they get really red. He gets around 8-9.5 hours of sleep every night.


Anyone know what's going on? Similar experiences? Comments? Questions or need more information?